| Journal: | Electronic journal of biotechnology |
| Database: | PERIÓDICA |
| System number: | 000336250 |
| ISSN: | 0717-3458 |
| Authors: | Krzywonos, Malgorzata1 Eberhard, Thomas2 |
| Institutions: | 1Wrocław University of Economics, Department of Bioprocess Engineering, Wroclaw. Polonia 2Swedish University of Agricultural Sciences, Uppsala Genetic Centre, Uppsala. Suecia |
| Year: | 2011 |
| Season: | Mar |
| Volumen: | 14 |
| Number: | 2 |
| Country: | Chile |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Experimental, aplicado |
| English abstract | Background: Owing to the growing interest in biofuels, the concept of a biorefinery where biomass is converted to a variety of useful products is gaining ground. We here present how distillery waste is combined with a by-product from a sugar production, molasses, to form a medium for the growth of Lactobacillus plantarum with yields and biomass densities comparable with conventional industrial media. Such approach enables a cost-effective utilization of the problematic wastewater from ethanol and a by-product from sugar production. It is the first approach that attempts to find low-cost media for the production of Lactobacillus plantarum biomass. Results: This study suggests that sieved wheat stillage enriched by adding 1.77 g/l yeast extract and 10% molasses (v/v), with NH4OH used for pH adjustment, may be used as a media for large-scale cultivation of L. plantarum. Such composition of the medium permits a high density of lactic acid bacteria (1.6 x 1010 cfu/ml) to be achieved. Conclusions: The use of a fermentation medium consisting of distillery wastewater and molasses to obtain value-added products (such as LAB biomass and lactic acid) is a possible step for classical ethanol production to move towards a biorefinery model production in which all by and waste products are utilized to increase produced values and reduce waste production. This enables a cost-effective utilization of the problematic wastewater from ethanol and sugar production |
| Disciplines: | Biología, Química |
| Keyword: | Biotecnología, Destilerías, Aguas residuales, Biorrefinación, Fermentación de alta densidad, Lactobacillus plantarum |
| Keyword: | Biology, Chemistry, Biotechnology, Distilleries, Waste water, Biorefining, High density fermentation, Lactobacillus plantarum |
| Full text: | Texto completo (Ver PDF) |
